need help with database connection string

hi ,
I am new in using this technology
and i am making a website
i created a database and i am using MS SQL , and ASP.NET
but i have a problem with the connection string i don't know the connection string for the database
say my name is websitex and the created database will be websitex_newdb but i don't know the connection string for it to use it in my code
can anyone help me with this ?
thanks in advance

 

i am using Parallels Plesk Control Panel 8.6

 

http://www.webcheatsheet.com/ASP/sqlserver_connection_strings.php

 

this is a tutorial

https://www.welookups.com